Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 132 · 40 sums

The method (Column by column): Line up ones, tens and hundreds. Add from the right; 10 or more → carry 1 to the next column. Subtract from the right; top digit smaller → borrow 1 from the next column. Missing number in an addition = total − the number you know.

1. 1.295 − ? = 146
2. 2.209 + 358 =
3. 3.282 + ? = 417
4. 4.A school has 909 children. 494 of them are girls. How many boys are there?
5. 5.A school has 563 children. 331 of them are girls. How many boys are there?
6. 6.406 − 169 =
7. 7.503 − 129 =
8. 8.339 + 557 =
9. 9.790 + ? = 933
10. 10.A train has 638 people in the front coaches and 223 people in the back coaches. How many people are on the train?
11. 11.863 − 744 =
12. 12.301 − ? = 62
13. 13.? − 830 = 155
14. 14.A train has 881 people in the front coaches and 107 people in the back coaches. How many people are on the train?
15. 15.A train has 313 people in the front coaches and 679 people in the back coaches. How many people are on the train?
16. 16.A train has 149 people in the front coaches and 772 people in the back coaches. How many people are on the train?
17. 17.A school has 474 children. 231 of them are girls. How many boys are there?
18. 18.904 − 621 =
19. 19.669 − 639 =
20. 20.543 − ? = 202
21. 21.A school has 538 children. 201 of them are girls. How many boys are there?
22. 22.? − 340 = 384
23. 23.A train has 477 people in the front coaches and 512 people in the back coaches. How many people are on the train?
24. 24.208 − 102 =
25. 25.A train has 379 people in the front coaches and 181 people in the back coaches. How many people are on the train?
26. 26.A train has 863 people in the front coaches and 113 people in the back coaches. How many people are on the train?
27. 27.A school has 723 children. 659 of them are girls. How many boys are there?
28. 28.165 + 190 =
29. 29.? + 347 = 932
30. 30.927 − ? = 219
31. 31.389 − 298 =
32. 32.A train has 528 people in the front coaches and 156 people in the back coaches. How many people are on the train?
33. 33.730 + 155 =
34. 34.850 − ? = 668
35. 35.? − 217 = 302
36. 36.258 − 142 =
37. 37.A school has 960 children. 300 of them are girls. How many boys are there?
38. 38.745 + 217 =
39. 39.A train has 183 people in the front coaches and 737 people in the back coaches. How many people are on the train?
40. 40.A train has 180 people in the front coaches and 272 people in the back coaches. How many people are on the train?

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